How do you run the Tornado web server locally?

Question

Is it possible to run Tornado such that it listens to a local port (e.g. localhost:8000). I can't seem to find any documentation explaining how to do this.

Answer 1

Add an address argument to Application.listen() or HTTPServer.listen().

It's documented here (Application.listen) and here (TCPServer.listen).

For example:

application = tornado.web.Application([
    (r'/blah', BlahHandler),
    ], **settings)

# Create an HTTP server listening on localhost, port 8080.
http_server = tornado.httpserver.HTTPServer(application)
http_server.listen(8080, address='127.0.0.1')

Answer 2

In the documetaion they mention to run on the specific port like

import tornado.ioloop
import tornado.web

class MainHandler(tornado.web.RequestHandler):
    def get(self):
        self.write("Hello, world")

application = tornado.web.Application([
    (r"/", MainHandler),
])

if __name__ == "__main__":
    application.listen(8000)
    tornado.ioloop.IOLoop.instance().start()

You will get more help from http://www.tornadoweb.org/documentation/overview.html and http://www.tornadoweb.org/documentation/index.html

Answer 3

Once you've defined an application (like in the other answers) in a file (for example server.py), you simply save and run that file.

python server.py